Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- R. Attri Instrumentation Design Series (Snow Hydrology) (5)
- R. Attri Instrumentation Design Series (Electronics) (4)
- Band pass filter (3)
- Biquad topology (2)
- R. Attri Instrumentation Design Series (Seismic) (2)
-
- Snow Temperature (2)
- Snow depth sensor (2)
- Avalanche forecast (1)
- Data Acquisition (1)
- Data communication (1)
- Filter topologies (1)
- Geo-Science (1)
- Instrumentation (1)
- Instrumentation system (1)
- LIDAR (1)
- Non-contact object detection (1)
- Op-amps (1)
- R. Attri Information Technology Series (1)
- RTD (1)
- Remote measurement (1)
- Seismic (1)
- Seismic Software (1)
- Sensor (1)
- Snow Layers (1)
- Snow surface (1)
- Snow temperature (1)
- Sonar (1)
- Ultrasonic pulse technique (1)
- Ultrasonics (1)
- Ultrasonics sensors (1)
Articles 1 - 12 of 12
Full-Text Articles in Engineering
Design Of A Reliable Remote Surface Detector Based On Ultrasonic Pulse-Transit Technique To Detect Uneven & Non-Smooth Porous Snow Surfaces, Raman Attri
Raman K. Attri
This paper discusses design control techniques used to design ultrasonic pulse echo method based remote surface detector to detect objects with porous, un-even, irregular surfaces like snow. For such surfaces there is ample possibility of scatter of reflected beam in multiple directions, absorption of ultrasonic energy within the pores and reflected energy too feeble to detect. In some cases the reflected beam may altogether miss the receiver resulting in no surface detection at all. Scatter and penetration of ultrasonic energy at such irregular porous uneven surfaces poses great difficulties in designing a reliable Remote Surface detector. In this paper, we …
Design Of Stable Narrow Band-Pass Filter Using Multi-Stage Biquad Topology, Raman Attri
Design Of Stable Narrow Band-Pass Filter Using Multi-Stage Biquad Topology, Raman Attri
Raman K. Attri
Band pass filtering techniques have been a challenging task due to requirement of keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The Biquad family of topologies are typically used for a stabilized filtering application, however the design requirements on Biquad topology for low frequency application is still a challenge. The requirements become more stringent for bandwidth curve, roll-off curve and preciseness of frequency filtering as we move down to low …
Practical Design Evaluation Of Extremely Narrow Band-Pass Filter Topologies, Raman K. Attri
Practical Design Evaluation Of Extremely Narrow Band-Pass Filter Topologies, Raman K. Attri
Raman K. Attri
Narrow Band pass filtering techniques have been a challenging task since the inception of audio and telecommunication applications. The challenge involves keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The requirements turns more stringent when working with low frequency Narrow band-pass filters where the shift in few Hz would cause great frequency errors. The selection of right topology for best performance is the key top successful design. This paper objectively …
Evaluation Of Single Op-Amp Topologies For Extremely Narrow Band-Pass Filter Design, Raman Attri
Evaluation Of Single Op-Amp Topologies For Extremely Narrow Band-Pass Filter Design, Raman Attri
Raman K. Attri
Narrow Band pass filtering techniques have been a challenging task since the inception of audio and telecommunication applications. The challenge involves keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The requirements turns more stringent when working with low frequency Narrow band-pass filters where even the shift in few Hz would cause great frequency errors. The selection of right topology for best performance is the key to successful design. This paper …
Non-Contact Detection Techniques And Technologies For Detection Of Objects In Air, Under-Ground And Under-Water, Raman Attri
Non-Contact Detection Techniques And Technologies For Detection Of Objects In Air, Under-Ground And Under-Water, Raman Attri
Raman K. Attri
In this white paper, we will present review and compilation of various object detection techniques currently available in different scenarios and situations. Automatic Object detection in the air, beneath other materials, under water and under the earth surface as well as over the surface is one of the advanced sciences employing many principles of multiple engineering domains together. “See-through” methods – seeing beyond the visible objects, has been inherent desire of human being since the practice of science. Not only this, a craving to detect the objects without directly “seeing upon” them with naked eyes calls upon some automatic procedures …
Design Approach To Use Platinum Rtd Sensor In Snow Temperature Measurements, Raman Attri
Design Approach To Use Platinum Rtd Sensor In Snow Temperature Measurements, Raman Attri
Raman K. Attri
The snow temperature measurement is a very critical area of hydrological instrumentation. The measured data is used to assess the run-off water, snow pack strength and snow avalanche. The hydrological and snow avalanche forecast models require that temperature be measured at different points in the snow pack, above the snow pack and below the snow pack. A state-of-the-art multi-point snow temperature measurement system has been designed and developed for this purpose. The type of the temperature sensor used is a critical aspect of this physical parameter instrumentation. After lot of study of various aspects of different temperature sensing elements, the …
Data Communication Software- Role And Functions, Raman K. Attri, Noor Jahan Haque
Data Communication Software- Role And Functions, Raman K. Attri, Noor Jahan Haque
Raman K. Attri
The shifting of communication systems from analog to digital has introduces a new area of data communication. The core of data communication is Communication software which is the topic of my paper today. In this paper I shall cover following areas: Overview of Data Communication, Role of Data Communication Software, Functional Aspects of Data Communication Software
Software Tool For Seismic Data Recorder And Analyser, Satish Kumar, Raman Attri, B. Sharma, M. Shamshi
Software Tool For Seismic Data Recorder And Analyser, Satish Kumar, Raman Attri, B. Sharma, M. Shamshi
Raman K. Attri
Design and Development of software controlled stand-alone instruments has been identified as the most vital component of national and intemational programs on earthquake hazard and risk management. For in depth investigation and studies, the development of precise instruments designed around computer is emerging very fast. Interacing of personal computer with seismic instrument is an important design task. A design technique based on minimum hardware has been worked out around the parallel printer interface of computer. Hardware and Software for this purpose has been designed to make the instrument interact with computer through parallel port interface. Incorporation of software for seismic …
Design Of An Instrumentation System To Record Distribution Profile Of Snow Layer Temperature For Modelling Of Snow Avalanche Forecast, Raman Attri
Raman K. Attri
The measurement of snow hydrological parameters is extremely important in developing a model for the predication of Snow avalanche as well as Snowmelt water in the rivers. When direct measurement of these parameters is practically difficult, its dependence on snow temperature is used to develop snow cover models. A robust model for avalanche forecasting requires a sophisticated instrumentation system which can measure the required temperature parameters at right data points within snow pack. A Snow Temperature Profile Sensing System along with Surface temperature Sensor has been designed to measure Snow temperature gradient, temperature distributions, and average temperature of snow pack, …
Implementation Of Linear Array Of Ultrasonic Transmitter-Receiver Transducers For Detection Of Non-Smooth Porous Surface, Raman K. Attri, Swaranjit Singh
Implementation Of Linear Array Of Ultrasonic Transmitter-Receiver Transducers For Detection Of Non-Smooth Porous Surface, Raman K. Attri, Swaranjit Singh
Raman K. Attri
Level measurements, thickness measurement or remote surface detection using ultrasonic pulse transit method require that the target surface be at 90O to the incident beam so that reflected beam comes back at 180O angel to effectively use this method. This is perfectly true in case of flat, solid surface at right angle to the incident beam. But surface irregularities of a porous, non-smooth, uneven material such as snow cause penetration of incident wave into the surface, absorption of the incident energy, scatter of energy in many directions and further attenuation of reflected signal making it difficult to detect the reflected …
Gsis: A Conceptual Model For Web-Based Integration Of Information Technology With Geo-Scientific Instrumentation, Raman Attri
Gsis: A Conceptual Model For Web-Based Integration Of Information Technology With Geo-Scientific Instrumentation, Raman Attri
Raman K. Attri
Since a long time leading organisations have been advocating the need of implementation of IT in a centralised manner on the distributed geological data monitoring centres. In the era of IT, it is highly important to access, share and analyse related data on a common platform for fast retrieval of information in centralised as well as in distributed mode. In this article a concept to integrate Geo-Scientific Instrumentation systems to Information Technology has been highlighted. The vision to create a Geo-Scientific Information System (GSIS) would be an approach where a centralised web-enabled database of the data acquired & transmitted by …
Snow Pack Temperature Sensor, M. Shamshi, Raman Attri, V. Sharma
Snow Pack Temperature Sensor, M. Shamshi, Raman Attri, V. Sharma
Raman K. Attri
The study of snow hydrological characteristics plays the major part in forecast of snow-melt, snow run-off water of rivers, potential release of snow avalan'che and climatic changes. Increasing importance of study of snow hydrology has lead to the development of many snow sensors which monitors physical parameter of snow. Design of such snow sensors has been a difficult job because of harsh environmental conditions. This paper present the design considerations and performance characteristics of snowpack temperature profile sensing probe. This probe provides temperature gradient and temperature distributions within the snow-pack, and ground at different depths. The information on temperature distribution …